Update 4:
- Apparently if one decides to remove their leather hat and attempt to put it in ones inventory (drag and drop) whilst in the trade window with the Druid Grove's Tiefling Smithy, it will crash your game.
Edit to Update 4:
The crash happened again, but it happened after I tried once and failed to reproduce it on the next save game re-load. When I tried it again, re-loading the save a third time, the crash occurred, and this also produced a crash report that I sent to Larian detailing the incident.